8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Dulles Corridor Special Study
Potential Mitigation Measures
Presented by:Fairfax County Department of Transportation
December 14, 2010
Presented to:Reston Master Plan Special Study Task Force
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
TRANSPORTATION ANALYSIS PROCESSReport on Existing Conditions
↓Assess 2030 Forecasted Conditions
↓Informs Change to Comprehensive Plan
↓Assess Future Scenario
↓Proposed Plan Amendment
↓Refine Analysis
↓Submit Chapter 527 Analysis to VDOT (if required)
↓Public Hearings
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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What is the Model?Travel Demand Forecasting Model
– Tool Used by all MPO’s in US – Regional Model used by MWCOG with CountyEnhancements
Land Use is Divided into Zones (TAZ’s)Supply of Transportation is represented by thehighway and transit networkDemand for Travel Developed Using a Series ofMathematical ModelsProvides information such as vehicle milestraveled (VMT) and mode choice/use
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Study Area
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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General Mitigation StrategiesStrategic Land Use (TOD)
Mixed –Use, Location, TypeLocal ConnectionsEnhanced Pedestrian and Bicycle Paths
Increase Use of TransitEnhanced TDMTraffic OperationsIntersection Improvements
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
• Potential Mitigation Strategies By Location
– Selected Problem Intersections Examined – Mitigation Measures Suggested for FutureConsideration and Evaluation
– Suggested Mitigation Measures Have NotBeen Evaluated
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8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Intersection Analysis
Abbreviation Terminologies:•LOS – Level of Service
•SOD – Seconds of Delay•NB – Northbound direction approaching the intersection
•SB – Southbound direction approaching the intersection
•WB – Westbound direction approaching the intersection•EB – Eastbound direction approaching the intersection
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Wiehle Avenue and Sunset Hills Road• Existing AM LOS D (45 sod)
– SB left turn – NB left turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Wiehle Avenue and Sunset Hills Road• Existing AM LOS D (45 sod)
– SB left turn – NB left turn
• Future AM LOS F (110 sod) – SB left turn – SB Wiehle Ave before the
intersection
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Wiehle Avenue and Sunset Hills Road• Existing AM LOS D (45 sod) – SB left turn – NB left turn
• Future AM LOS F (110 sod) – SB left turn – SB Wiehle Ave before the
intersection
• Existing PM LOS F (80 sod) – WB left turn – EB right turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Wiehle Avenue and Sunset Hills Road• Existing AM LOS D (45 sod) – SB left turn – NB left turn
• Future AM LOS F (110 sod) – SB left turn – SB Wiehle Ave before the
intersection
• Existing PM LOS F (80 sod) – WB left turn – EB right turn
• Future PM LOS F (280 sod) – WB left turn – EB right turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
• Potential Mitigation Measures to Consider: – Add local north-south connection through Isaac Newton Square – Build Soapstone Extension across Dulles Toll Road (Comp Plan) – Improve EB Sunset Hills right turn lane (RMAG)
– Dedicated bus lane on Sunset Hills (RMAG) – Add dual left turn lanes on WB Sunset Hills Road – Add dual left turn lanes on SB Wiehle Avenue
Wiehle Avenue and Sunset Hills Road
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Wiehle Avenue and Sunrise Valley Drive• Existing AM LOS D (40 sod) – EB left turn – SB left turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Wiehle Avenue and Sunrise Valley Drive• Existing AM LOS D (40 sod) – EB left turn – SB left turn
• Future AM LOS F (100 sod) – EB left turn – SB left turn
– WB right turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Wiehle Avenue and Sunrise Valley Drive• Existing AM LOS D (40 sod) – EB left turn – SB left turn
• Future AM LOS F (100 sod) – EB left turn – SB left turn
– WB right turn• Existing PM LOS C (30 sod)
– SB left turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Wiehle Avenue and Sunrise Valley Drive• Existing AM LOS D (40 sod) – EB left turn – SB left turn
• Future AM LOS F (100 sod) – EB left turn – SB left turn
– WB right turn• Existing PM LOS C (30 sod)
– SB left turn
• Future PM LOS D (50 sod) – SB left turn – EB left turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
• Potential Mitigation Measures to Consider: – Improve WB Sunrise Valley Drive right turn lane (RMAG) – Build Soapstone Extension across Dulles Toll Road (Comp Plan) – Add channelization to avoid turning conflicts
Wiehle Avenue and Sunrise Valley Drive
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Reston Parkway and Sunset Hills Road• Existing AM LOS F (90 sod) – NB left turn – NB right turn
• Future AM LOS F (190 sod) – NB right turn – NB left turn and WB left turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Reston Parkway and Sunset Hills Road
• Existing PM LOS F (110 sod) – WB left turn
• Existing AM LOS F (90 sod) – NB left turn – NB right turn
• Future AM LOS F (190 sod) – NB right turn – NB left turn and WB left turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Reston Parkway and Sunset Hills Road• Existing AM LOS F (90 sod) – NB left turn – NB right turn
• Future AM LOS F (190 sod) – NB right turn – NB left turn and WB left turn
• Existing PM LOS F (110 sod) – WB left turn
• Future PM LOS F (240 sod)
– WB left turn• Overall there are heavy
volumes for all turningmovements and through lanes
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
• Potential Mitigation Measures to Consider:
– Town Center Parkway extension under DTR (Comp Plan andRMAG) – Grade separate through movements on Reston Parkway
• Shrink intersection to improve pedestrian crossings
Reston Parkway and Sunset Hills Road
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Reston Parkway and Sunrise Valley Drive• Existing AM LOS E (60 sod) – SB left turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Reston Parkway and Sunrise Valley Drive• Existing AM LOS E (60 sod) – SB left turn
• Future AM LOS F (110 sod) – SB left turn – NB Reston Pkwy through
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Reston Parkway and Sunrise Valley Drive• Existing AM LOS E (60 sod) – SB left turn
• Future AM LOS F (110 sod) – SB left turn – NB Reston Pkwy through
• Existing PM LOS E (79 sod) – SB Reston Pkwy through – WB right turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Reston Parkway and Sunrise Valley Drive• Existing AM LOS E (60 sod) – SB left turn
• Future AM LOS F (110 sod) – SB left turn – NB Reston Pkwy through
• Existing PM LOS E (79 sod) – SB Reston Pkwy through – WB right turn
• Future PM LOS F (150 sod) – SB Reston Pkwy through – WB right turn
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
• Potential Mitigation Measures to Consider:
– Town Center Parkway extension under DTR (Comp Plan andRMAG) – Improve SB Reston Parkway right turn lane (RMAG) – Add third lane on Reston Parkway (per Comp Plan north of Sunrise
Valley Drive)
Reston Parkway and Sunrise Valley Drive
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
Wiehle Avenue Station Cordon Analysis Results
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
Reston Parkway Station Cordon Analysis Results
8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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8/8/2019 Reston Peak Traffic Conditions, 2030 Forecast, FC DOT, 12-14-2010
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County of Fairfax, Virginia
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Questions/Discussion